Add install kubectl script

install-scripts/.local/bin/install-kubectl

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# shellcheck disable=SC1090
+source "${XDG_DATA_HOME}/buddy-up/includes/utils.sh"
+
+set -e
+
+get_arch () {
+    case $(uname -m) in
+        x86_64*)    echo amd64;;
+        arm64*)     echo arm64;;
+        *)          >&2 echo "unsupported architecture: $(uname -m)"; exit 1;;
+    esac
+}
+
+APP=kubectl
+# https://dl.k8s.io/release/stable.txt
+VERSION=${VERSION:-1.23.5}
+DEST=${XDG_DATA_HOME}/apps/releases/${APP}
+URL=https://dl.k8s.io/release/v${VERSION}/bin/$(get_os)/$(get_arch)/kubectl
+
+APP_PATH=${DEST}/${VERSION}/kubectl
+if [[ ! -f "${APP_PATH}" ]]; then
+    mkdir -p "${DEST}/${VERSION}"
+    curl --silent --location --output "${APP_PATH}" "${URL}"
+    chmod +x "${APP_PATH}"
+fi
+
+set_current_link "${DEST}" "${VERSION}"
+set_link  "${XDG_BIN_HOME}/${APP}"                            "${DEST}"  "${APP}"